Centrifugal Process
Slurry, Sludge & Solids Handling
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Submersible/Immersible
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See table on Classification of Pumps According to Solid Particle Size
Basic Formulae and Symbols
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PUMP SYMBOLS GPM = gallons per minute Lb = pounds Hr. = hour Sp. Gr. = specific gravity H = head in feet psi = pounds per square inch In. Hg. = inches in mercury hv = velocity head in feet V = velocity in feet per second g = 32.16 ft./sec.2 (acceleration of gravity) A = area in square inches I.D. = inside diameter in inches BHP = break horsepower Eff. = pump efficiency expressed as a decimal N = speed, RPM Ns = specific speed Nss = suction specific speed D = impeller in inches NPSH = net positive suction head NPSH^ = net positive suction available Pa = atmospheric pressure in psia Pvp = vapor pressure in psia w = specific weight of liquid in pounds/cu. ft. hs = total suction head ft. Q = capacity in GPM |
